[paper] Magnetic moments of K isomers as indicators of octupole collectivity

Magnetic moments of K isomers as indicators of octupole collectivity

N. Minkov and P. M. Walker

doi: 10.1140/epja/i2012-12080-y

The relation between the quadrupole-octupole deformation and the structure of high-K isomers in heavy even-even nuclei is studied through a reflection asymmetric deformed shell model including a BCS procedure with constant pairing interaction. Two-quasiparticle states with Kπ=4, 5, 6, 6+ and 7 are considered in the region of actinide nuclei (U, Pu and Cm) and rare-earth nuclei (Nd, Sm and Gd). The behaviour of two-quasiparticle energies and magnetic dipole moments of these configurations is examined over a wide range in the plane of quadrupole and octupole deformations (&betal2 and β3. In all considered actinide nuclei, the calculations show that there is pronounced sensitivity of the magnetic moments to the octupole deformation. In the rare-earth nuclei, the calculations for 154,156Gd show stronger sensitivity of the magnetic moment to the octupole deformation than in the other considered cases.

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